In this work, we propose a discussion about the presence of images, especially the metaphor and metonymy in compositions written by candidates of the Fuvest and ENEM tests, as well as the occurrence of images in a writing proposal. The motivation for this research is to identify the presence of these processes in the texts produced by the candidates and how to provide to the student resources for them to interpret a metaphorical proposal for the text and produce texts exploring the argumentative force of metaphor and metonymy. The corpus used was a sample with some writing from Fuvest and ENEM. The research was carried out from the perspective of Cognitive Linguistics, with especial emphasis on complex mental operations such as Reading and Memory; Mental Spaces; Categorization and Theory of Prototypes; Analogy; Metaphor and Metonymy; Conceptual Integration.